Method for manufacturing magnetic heating element particles, conductive paste, and method for forming conductive film using same
The present invention provides a method for manufacturing a conductive film, comprising the steps of: applying, to a substrate, a conductive paste dispersed in an organic material and comprising metal particles and Fe—B—Cu—C alloy magnetic heating element particles; and selectively sintering the applied conductive paste by means of induction heating so as to form a conductive film, wherein the magnetic heating element particles are implemented with crystallized Fe—B—Cu—C alloy particles. Therefore, it is possible to selectively form a conductive adhesive layer by sintering through induction heating. In addition, it is possible to produce an adhesive capable of low-temperature bonding by forming a magnetic heating element having crystal grains with a large coercive force through heat treatment after formation of an alloy.
1 . A method for manufacturing magnetic heating element particles, the method including:
producing an Fe—B—Cu—C alloy ingot by mixing and melting Fe, B, C, and Cu in a predetermined content;
rapidly solidifying the Fe—B—Cu—C alloy ingot to produce an amorphous alloy ribbon;
heat-treating the amorphous alloy ribbon to a first temperature or higher to crystallize the same; and
pulverizing the crystallized alloy ribbon to produce Fe—B—Cu—C alloy magnetic heating element particles,
wherein a size of crystal grains of the magnetic heating element particles is 70 nm to 300 nm.
2 . The method of claim 1 , wherein a particle diameter of the magnetic heating element particles is 100 nm to 100 μm.
3 . The method of claim 1 , wherein the magnetic heating element particles have a composition of Fe 84.3 B 13.7 Cu 1 C 1 .
4 . The method of claim 1 , wherein the first temperature is 500° C.
5 . The method of claim 1 , wherein in the pulverizing of the crystallized alloy ribbon to produce Fe—B—Cu—C alloy magnetic heating element particles, the magnetic heating element particles are produced by pulverizing the crystallized alloy ribbon at a low temperature with a cold ball grinder.